Hooked up the emulated Wiimote speaker.

The Wiimotes are positioned as follows:
Wiimote 0 = Center
Wiimote 1 = Left
Wiimote 2 = Right
Wiimote 3 = Center

The Wiimote speaker output can be disabled via the "Enable Speaker Data" checkbox in the Wiimote settings.

Source/Core/AudioCommon/Mixer.cpp

@@ -121,6 +121,7 @@ unsigned int CMixer::Mix(short* samples, unsigned int num_samples, bool consider
 
 	m_dma_mixer.Mix(samples, num_samples, consider_framelimit);
 	m_streaming_mixer.Mix(samples, num_samples, consider_framelimit);
+	m_wiimote_speaker_mixer.Mix(samples, num_samples, consider_framelimit);
 	if (m_logAudio)
 		g_wave_writer.AddStereoSamples(samples, num_samples);
 	return num_samples;
@@ -167,6 +168,31 @@ void CMixer::PushStreamingSamples(const short *samples, unsigned int num_samples
 	m_streaming_mixer.PushSamples(samples, num_samples);
 }
 
+void CMixer::PushWiimoteSpeakerSamples(const short *samples, unsigned int num_samples, unsigned int sample_rate, const u8 wiimote_index)
+{
+	short samples_stereo[MAX_SAMPLES * 2];
+
+	if (num_samples < MAX_SAMPLES)
+	{
+		m_wiimote_speaker_mixer.SetInputSampleRate(sample_rate);
+
+		for (unsigned int i = 0; i < num_samples; ++i)
+		{
+			// Position the Wiimotes as follow
+			// Wiimote 0 = Center
+			// Wiimote 1 = Left
+			// Wiimote 2 = Right
+			// Wiimote 3 = Center
+			if (wiimote_index != 2)
+				samples_stereo[i * 2] = Common::swap16(samples[i]);
+			if (wiimote_index != 1)
+				samples_stereo[i * 2 + 1] = Common::swap16(samples[i]);
+		}
+
+		m_wiimote_speaker_mixer.PushSamples(samples_stereo, num_samples);
+	}
+}
+
 void CMixer::SetDMAInputSampleRate(unsigned int rate)
 {
 	m_dma_mixer.SetInputSampleRate(rate);
@@ -182,6 +208,11 @@ void CMixer::SetStreamingVolume(unsigned int lvolume, unsigned int rvolume)
 	m_streaming_mixer.SetVolume(lvolume, rvolume);
 }
 
+void CMixer::SetWiimoteSpeakerVolume(unsigned int lvolume, unsigned int rvolume)
+{
+	m_wiimote_speaker_mixer.SetVolume(lvolume, rvolume);
+}
+
 void CMixer::MixerFifo::SetInputSampleRate(unsigned int rate)
 {
 	m_input_sample_rate = rate;

Source/Core/AudioCommon/Mixer.h

@@ -24,6 +24,7 @@ public:
 	CMixer(unsigned int BackendSampleRate)
 		: m_dma_mixer(this, 32000)
 		, m_streaming_mixer(this, 48000)
+		, m_wiimote_speaker_mixer(this, 3000)
 		, m_sampleRate(BackendSampleRate)
 		, m_logAudio(0)
 		, m_speed(0)
@@ -39,11 +40,13 @@ public:
 	// Called from main thread
 	virtual void PushSamples(const short* samples, unsigned int num_samples);
 	virtual void PushStreamingSamples(const short* samples, unsigned int num_samples);
+	virtual void PushWiimoteSpeakerSamples(const short* samples, unsigned int num_samples, unsigned int sample_rate, const u8 wiimote_index);
 	unsigned int GetSampleRate() const { return m_sampleRate; }
 
 	void SetDMAInputSampleRate(unsigned int rate);
 	void SetStreamInputSampleRate(unsigned int rate);
 	void SetStreamingVolume(unsigned int lvolume, unsigned int rvolume);
+	void SetWiimoteSpeakerVolume(unsigned int lvolume, unsigned int rvolume);
 
 	virtual void StartLogAudio(const std::string& filename)
 	{
@@ -112,6 +115,7 @@ protected:
 	};
 	MixerFifo m_dma_mixer;
 	MixerFifo m_streaming_mixer;
+	MixerFifo m_wiimote_speaker_mixer;
 	unsigned int m_sampleRate;
 
 	WaveFileWriter g_wave_writer;

Source/Core/Core/HW/WiimoteEmu/Speaker.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
+#include "AudioCommon/AudioCommon.h"
 #include "Core/HW/WiimoteEmu/WiimoteEmu.h"
 
 //#define WIIMOTE_SPEAKER_DUMP
@@ -64,6 +65,9 @@ void stopdamnwav(){wav.Stop();ofile.close();}
 
 void Wiimote::SpeakerData(wm_speaker_data* sd)
 {
+	if (!SConfig::GetInstance().m_WiimoteEnableSpeaker)
+		return;
+
 	// TODO consider using static max size instead of new
 	s16 *samples = new s16[sd->length * 2];
 
@@ -74,6 +78,8 @@ void Wiimote::SpeakerData(wm_speaker_data* sd)
 		{
 			samples[i] = (s16)(s8)sd->data[i];
 		}
+		soundStream->GetMixer()->SetWiimoteSpeakerVolume(256, 256);
+		soundStream->GetMixer()->PushWiimoteSpeakerSamples(samples, sd->length, 1500, m_index);
 	}
 	else if (m_reg_speaker.format == 0x00)
 	{
@@ -83,6 +89,8 @@ void Wiimote::SpeakerData(wm_speaker_data* sd)
 			samples[i * 2] = adpcm_yamaha_expand_nibble(m_adpcm_state, (sd->data[i] >> 4) & 0xf);
 			samples[i * 2 + 1] = adpcm_yamaha_expand_nibble(m_adpcm_state, sd->data[i] & 0xf);
 		}
+		soundStream->GetMixer()->SetWiimoteSpeakerVolume(256, 256);
+		soundStream->GetMixer()->PushWiimoteSpeakerSamples(samples, sd->length, 3000, m_index);
 	}
 
 #ifdef WIIMOTE_SPEAKER_DUMP

Source/Core/DolphinWX/WiimoteConfigDiag.cpp

@@ -113,15 +113,10 @@ WiimoteConfigDiag::WiimoteConfigDiag(wxWindow* const parent, InputConfig& config
 	continuous_scanning->Bind(wxEVT_CHECKBOX, &WiimoteConfigDiag::OnContinuousScanning, this);
 	continuous_scanning->SetValue(SConfig::GetInstance().m_WiimoteContinuousScanning);
 
-	auto wiimote_speaker = new wxCheckBox(this, wxID_ANY, _("Enable Speaker Data"));
-	wiimote_speaker->Bind(wxEVT_CHECKBOX, &WiimoteConfigDiag::OnEnableSpeaker, this);
-	wiimote_speaker->SetValue(SConfig::GetInstance().m_WiimoteEnableSpeaker);
-
 	real_wiimotes_sizer->Add(continuous_scanning, 0, wxALIGN_CENTER_VERTICAL);
 	real_wiimotes_sizer->AddStretchSpacer(1);
 	real_wiimotes_sizer->Add(refresh_btn, 0, wxALL | wxALIGN_CENTER, 5);
 
-	real_wiimotes_group->Add(wiimote_speaker, 0);
 	real_wiimotes_group->Add(real_wiimotes_sizer, 0, wxEXPAND);
 
 	// "General Settings" controls
@@ -131,6 +126,10 @@ WiimoteConfigDiag::WiimoteConfigDiag(wxWindow* const parent, InputConfig& config
 	wxSlider* const WiimoteSpkVolume = new wxSlider(this, wxID_ANY, 0, 0, 127);
 	wxCheckBox* const WiimoteMotor = new wxCheckBox(this, wxID_ANY, _("Wiimote Motor"));
 
+	auto wiimote_speaker = new wxCheckBox(this, wxID_ANY, _("Enable Speaker Data"));
+	wiimote_speaker->Bind(wxEVT_CHECKBOX, &WiimoteConfigDiag::OnEnableSpeaker, this);
+	wiimote_speaker->SetValue(SConfig::GetInstance().m_WiimoteEnableSpeaker);
+
 	wxStaticText* const WiiSensBarPosText = new wxStaticText(this, wxID_ANY, _("Sensor Bar Position:"));
 	wxStaticText* const WiiSensBarSensText = new wxStaticText(this, wxID_ANY, _("IR Sensitivity:"));
 	wxStaticText* const WiiSensBarSensMinText = new wxStaticText(this, wxID_ANY, _("Min"));
@@ -204,6 +203,7 @@ WiimoteConfigDiag::WiimoteConfigDiag(wxWindow* const parent, InputConfig& config
 
 	wxGridSizer* const general_wiimote_sizer = new wxGridSizer(1, 5, 5);
 	general_wiimote_sizer->Add(WiimoteMotor);
+	general_wiimote_sizer->Add(wiimote_speaker, 0);
 
 	general_sizer->Add(choice_sizer);
 	general_sizer->Add(general_wiimote_sizer);